|V_ub| from UTangles and B->pi l nu

Details |V_ub| from UTangles and B->pi l nu |V_ub| from UTangles and B->pi l nu

2006-11-08

arxiv.org/abs/hep-ph/0611108v1

Phys.Lett.B644:38-44,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 3 figures

Scientific paper

10.1016/j.physletb.2006.11.034

The angles of the CKM unitarity triangle are now known well enough to allow a determination of its sides from global fits, with good accuracy. Assuming that new physics does not affect the angles, UTfit and CKMfitter find $|V_{ub}| = (3.50\pm 0.18)\times 10^{-3}$. Using this result, and new high-precision data on the spectrum of $B\to\pi \ell\nu$ decays from BaBar, we find $|V_{ub}| f_+(0) = (9.1\pm 0.7)\times 10^{-4}$ and $f_+(0) = 0.26\pm 0.02$, with $f_+$ the $B\to\pi$ weak transition form factor. These results are {\em completely model-independent}. We compare them to theoretical calculations from lattice and QCD sum rules on the light-cone.

Affiliated with

Also associated with

No associations

Rating

|V_ub| from UTangles and B->pi l nu does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with |V_ub| from UTangles and B->pi l nu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and |V_ub| from UTangles and B->pi l nu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-408278